TP-Link 10GE T1700G-28TQUN V1 CLI Reference Guide - Page 224

Parameter instance-id -- Instance ID, ranging from 1 to 8. pri -- Port Priority, which must be multiple of 16 ranging from 0 to 240. By default, it is 128. Port Priority is an important criterion on determining if the port will be chosen as the root port by the device connected to this port. cost -- Path Cost, ranging from 0 to 200000. The lower value has the higher priority. Its default value is 0 meaning "auto". Command Mode Interface Configuration Mode (interface gigabitEthernet / interface range gigabitEthernet / interface ten-gigabitEthernet / interface range ten-gigabitEthernet / interface port-channel / interface range port-channel) Privilege Requirement Only Admin, Operator and Power User level users have access to these commands. Example Configure the priority of port 1 in MST Instance 1 as 64, and path cost as 2000: T1700G-28TQ(config)# interface gigabitEthernet 1/0/1 T1700G-28TQ(config-if)# spanning-tree mst instance 1 port-priority 64 cost 2000 26.12 spanning-tree priority Description The spanning-tree priority command is used to configure the bridge priority. To return to the default value of bridge priority, please use no spanning-tree priority command. Syntax spanning-tree priority pri no spanning-tree priority Parameter pri -- Bridge priority, ranging from 0 to 61440. It is 32768 by default. Command Mode Global Configuration Mode 208